Missing songs from favourite songs

[PapaEmeritusIII]

Plan

Free/Premium

Country

 Denmark

Device

Huawei P9

Operating System

Android 7

My Question or Issue

 On my pc i added over a thousand tracks to my favourite song list (the one where you press the heart symbol to add) but on my phone most of the tracks are missing, it seems to be the tracks where I added them by "hearting" the whole album the track is from. I have checked on my pc as well and there all the tracks are on the list.